As Akari's summer break has finally begun, she wracks her brain to come up with fun, summery things she can do together with Sophie.
However, the ocean or anything outside are all a bad fit for a vampire like Sophie.
Then she has a moment of clarity and realized that a firework festival is at night and a summery activity, so she immediately begins preparing yukata.
Erie and Hinata and join them to go to the festival, however...
wearing clothes doesn't 
actually make us warmer.
.لا ندفأ بارتداء الملابس
wird uns selbst mit Kleidung nicht heiß.
llevar ropa no nos da calor.
Llevar ropa no nos da calor.
Les vêtements
ne nous donnent pas chaud.
quindi i vestiti non ci scaldano.
vestir roupas não nos aquece.
так что одежда не особо нас греет.